# Troubleshooting

## Common Problems

| Problem                                      | Most Common Reasons                                                                                                                                         |
| -------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------- |
| ** Can't retrieve Study List over DICOMWeb** | 1. QIDO root URL is incorrect<br> 2. DICOM Web is not enabled on PACS                                                                                       |
| ** Can't retrieve images**                   | 1. WADO Root URL is incorrect<br> 2. DICOM Web is not enabled on PACS<br> 3. HTTP Basic Authentication username and password are incorrect or not provided. |

## Debugging Steps

### Can't retrieve Study List over DICOMWeb

1. Check that you can query your PACS using an alternative DICOM Web client
   (e.g. cURL, or a Web Browser). If you cannot, then your PACS is configured
   incorrectly. Refer to the documentation of the image archive.